Join in expert discussion on quantum physics. Quantum physics is the mathematical description of the motion and interaction of subatomic particles. Quantum Mechanics and Field Theory.
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Undergrad How Does Threshold Frequency Support the Particle Theory of Light?
- Minnie
- · Replies 6 ·
Graduate What is the paraquantization? How does one develop a geometric pq?
- theyazen
- · Replies 5 ·
Graduate What is Propagator in Quantum Mechanics?
- jostpuur
- · Replies 5 ·
Graduate Difference between quantum physics and quantum mechanics
- WarrickF
- · Replies 27 ·
Graduate Covariant quantum field theories
- Jim Kata
- · Replies 10 ·
Graduate Questions about operators in QM
- atifelahi
- · Replies 1 ·
Graduate How does one develop a Hamiltonian for a free particle?
- ehrenfest
- · Replies 2 ·
Graduate How do virtual photons cause attraction between protons and electrons?
- michael879
- · Replies 13 ·
Graduate Does Moon exist if you don't look at it?
- lightarrow
- · Replies 18 ·
Graduate Anticommutation Example: Solving for Operator p in Relation to Variable q"
- jostpuur
- · Replies 6 ·
Graduate Locality/nonlocality for bound states - a question
- pawelsobko
- · Replies 7 ·
Graduate Can i exploit johnson noise to violate the second law?
- parsec
- · Replies 1 ·
Graduate Wheeler's delayed choice gedanken experiment
- Bertrand
- · Replies 6 ·
Graduate Does quantum theory require an observer's mind to collapse superposition?
- qtheoryquestion
- · Replies 15 ·
Graduate Can You Fit an Infinite Amount of Energy in a Space?
- gareth
- · Replies 1 ·
Graduate A few questions about QM and QFT.
- STS816
- · Replies 11 ·
Undergrad Electron spin, why do the pairs have to be opposite?
- Sephiroth2088
- · Replies 3 ·
Graduate I don't understand the paradox of entanglement
- Mephisto
- · Replies 8 ·
Graduate Understanding Quantum Interpretations to Different Perspectives
- phildoe
- · Replies 3 ·
Graduate What is the relationship between HUP and particle accelerators?
- rewebster
- · Replies 29 ·
Graduate A few quantum mechanics questions
- ppyadof
- · Replies 14 ·
Graduate Where are relativistic corrections applied and why?
- taoke
- · Replies 1 ·
Graduate Does Pauli's principle prevent an electron from having infinte energy?
- Mr Virtual
- · Replies 8 ·
Graduate What is lacking in QM that String theory wishes to fill up?
- Mr Virtual
- · Replies 10 ·
Graduate Applying QFT and the Standard Model to real physical systems
- einKI
- · Replies 7 ·
Graduate How far does the Pauli Exclusion Principle apply?
- Sojourner01
- · Replies 6 ·
Graduate Time ordered product vs. commutator in path integral
- kharranger
- · Replies 2 ·
Graduate Path integrals and propagators
- Klaus_Hoffmann
- · Replies 5 ·
Graduate Quantum field theory vs particle physics
- Demystifier
- · Replies 4 ·
Graduate Photon-Ghost Coupling: Quantum Lagrangian Density Analysis
- astros
- · Replies 9 ·
Graduate Best Teleportation Fidelity to date
- beautiful1
- · Replies 2 ·
Graduate Rough Description of State Space
- chessforce
- · Replies 2 ·
Graduate Complete basis for quantum oscillator Hilbert space
- smallphi
- · Replies 43 ·
Graduate How does the operator in Bra-Ket notation work in the position basis?
- mrandersdk
- · Replies 10 ·
Graduate What is D-Wave's Progress in Quantum Computing?
- Bertrand
- · Replies 3 ·
Graduate Understanding Basis Ambiguity in Zurek's Decoherence Paper
- Talisman
- · Replies 14 ·
Graduate How did Rydberg rewrite Balmer's equation to determine it was a special case?
- bluestar
- · Replies 6 ·
Graduate Measuring velocity and position of a particle
- Farzan
- · Replies 7 ·
Graduate Is the study of black holes using entanglement practical?
- pinkumbra
- · Replies 8 ·
Graduate How Does Momentum Measurement Affect Uncertainty in an Infinite Potential Well?
- HumbleStudent
- · Replies 4 ·
Undergrad Difference between E=p²/2m and E=hf
- alik
- · Replies 2 ·
Graduate About symmetry operation and a corresponding unitary transformation
- dream_chaser
- · Replies 4 ·
Graduate What is Quantum Physics in simple?
- Cookie_1993
- · Replies 25 ·
Graduate Where does the energy possessed by a free electron come from
- Mr Virtual
- · Replies 5 ·
Graduate Where can I find a comprehensive derivation of the Euler-Lagrange equation?
- ehrenfest
- · Replies 1 ·
Graduate The Spin-Up/Spin-Down Effect in the Stern-Gerlach Experiment
- touqra
- · Replies 6 ·
Graduate Operators and Complete State Descriptions in Quantum Mechanics
- black_kitty
- · Replies 2 ·
Graduate How does spin justify Pauli's principle?
- Mr Virtual
- · Replies 14 ·
Graduate Why do we need a photon to mediate the electromagnetic force?
- LorentzR
- · Replies 99 ·
Graduate Do electrons emit real quarks when dropping between energy levels?
- Pakbabydoll
- · Replies 1 ·
Graduate What is the concept of spooky action at a distance?
- DrWatson
- · Replies 3 ·
Graduate Have all the electrons in this universe come from a single electron?
- Mr Virtual
- · Replies 8 ·
Graduate How Can I Build a Scanning Tunnelling Microscope for Under $150?
- plxmny
- · Replies 9 ·
Graduate Expectation Value of Momentum in H-Atom
- quantumdude
- · Replies 9 ·
Graduate What Are the Best Research Articles on Quantum Dots?
- G01
- · Replies 4 ·
Graduate Do equivalent quantum states imply entanglement?
- pinkumbra
- · Replies 3 ·
Graduate Penrose's The Road to Reality and Princeton lectures
- marcus
- · Replies 19 ·
Graduate Malus law in quantum mechanics
- AlexHT
- · Replies 1 ·
Graduate Feynmann diagrams, bhabha scattering
- physics_fun
- · Replies 15 ·
Graduate Can the Pauli principle be visualized?
- Tsunami
- · Replies 4 ·
Graduate Under what conditions will quantum effects become important for gravity?
- jingles2005
- · Replies 5 ·
Graduate Can Kinetic Energy Ever Be Negative in Quantum Mechanics?
- pivoxa15
- · Replies 7 ·
Graduate How do the spin matrices connect to the geometry and physical reality of spin?
- pivoxa15
- · Replies 8 ·
Graduate What Happens to the Wavefunction After Measurement?
- regent
- · Replies 3 ·
Graduate Wave packets that feel harmonic potential
- jostpuur
- · Replies 5 ·
Graduate Unclear about the Heisenberg uncertainty principle
- Nerro
- · Replies 4 ·
Graduate Generation of polarization entangled photons
- AlexHT
- · Replies 1 ·
Graduate Hamiltonian of Minimum Uncertainty State
- Gza
- · Replies 2 ·
Graduate What Are Spin Functions and How Do They Work?
- Repetit
- · Replies 3 ·
Graduate Perturbation Theory: Higher Order Energy + Deviation from True Solution?
- pivoxa15
- · Replies 4 ·
Graduate Entangled Photons with no shared Past
- DrChinese
- · Replies 40 ·
Graduate Is the 2-D Wigner-Eckert Theorem applicable to cylindrical harmonics?
- Surrealist
- · Replies 7 ·
Graduate How Does the Klein-Gordon Hamiltonian Define the Evolution of Field Variables?
- shoehorn
- · Replies 2 ·
Graduate Is quantum field theory a genuine quantum theory?
- Demystifier
- · Replies 3 ·
High School What makes a proton positive and an electron negative?
- stochastic
- · Replies 4 ·
Graduate How Many Gluons Are Inside a Proton?
- stochastic
- · Replies 1 ·
Graduate Does Quantum Mechanics Suggest Violations of Conservation Laws?
- pivoxa15
- · Replies 3 ·
Graduate Relating reflection coefficient to wave packet probability in delta potential scattering
- tim_lou
- · Replies 2 ·
Graduate Are all representations of the Dirac delta function equivalent?
- Mike2
- · Replies 2 ·
Graduate Do Quantum Numbers Determine the Node Structure of Wavefunctions?
- christianjb
- · Replies 3 ·
Graduate Rigorous distributional treatment of delta potential Schrödinger equation
- tim_lou
- · Replies 6 ·
Graduate Multiple Particles in a Box: How Does the Schrodinger Equation Change?
- pivoxa15
- · Replies 3 ·
High School The Double Slit Experiment: A Fascinating Introduction to Quantum Physics
- Gadget_Wizard
- · Replies 5 ·
Graduate Quantum vaccum one dimensional?
- physicsx0rz
- · Replies 2 ·
Graduate Commutators and the Parametric Nonrelativistic Particle?
- Angryphysicist
- · Replies 1 ·
Graduate Can an energy eigenfunction also be a momentum eigenfunction?
- pivoxa15
- · Replies 4 ·
Graduate Question on Experiments with Entangled Particles and Quantum Mechanics
- cybercrypt13
- · Replies 28 ·
Graduate Selection rules and related stuffs
- Weimin
- · Replies 1 ·
Graduate How to Solve Quantum Mechanics Problems Using Commutation Relations
- kib97153
- · Replies 4 ·
Graduate How Do You Calculate Spectral Line Width?
- r-dizzel
- · Replies 1 ·
Graduate Tunneling past the speed of light
- michael879
- · Replies 6 ·
Graduate QM of particles with no common past light cone
- ueit
- · Replies 1 ·
Graduate Photon is different from an eletron
- Ngom
- · Replies 4 ·
Graduate KWhat conditions must a wavefunction satisfy for all values of x?
- r-dizzel
- · Replies 8 ·
Graduate What does it mean for a quantum state to achieve minimum uncertainty?
- pivoxa15
- · Replies 25 ·
Graduate Does quantum entanglement violate the locality requirement of relativity?
- UglyDuckling
- · Replies 225 ·
Graduate Does the uncertainty principle reflect physical reality or measurement limitations?
- muh1616715
- · Replies 26 ·
Graduate Does the Pauli Exclusion Principle Imply Orthogonality of Quantum States?
- jostpuur
- · Replies 7 ·
Graduate Why is glass QM transparent ?
- Cane_Toad
- · Replies 22 ·